EP 0168220 A2 19860115 - Method and apparatus for converting an analog signal to a digital signal using an oversampling technique.
Title (en)
Method and apparatus for converting an analog signal to a digital signal using an oversampling technique.
Title (de)
Verfahren und Einrichtung zur Umwandlung eines Analogsignals in ein Digitalsignal mittels einer Übertastungstechnik.
Title (fr)
Procédé et dispositif pour convertir un signal analogique en un signal numérique utilisant une technique de suréchantillonnage.
Publication
Application
Priority
- JP 13963584 A 19840705
- JP 14892084 A 19840718
Abstract (en)
An analogue signal on terminal (1) is sampled by a sampler (11) operating at a rate in excess of Nyquist rate. A locally decoded signal is subtracted in a subtracter (12) to produce an error signal which may be integrated (13) and again have the locally decoded signal subtracted (14) to provide a difference signal to a two-level quantizer (15). The output of the quantizer is integrated by an integrator (16) to provide the locally decoded signal. A Nyquist rate digital signal is provided not from the output of the integrator (16) but by way of another integrator (23) preceded by a sampling frequency converter (22) which converts the output of the quantizer (15) down to an intermediate frequency for digital filtering (20) and re-sampling (21) at Nyquist rate.
IPC 1-7
IPC 8 full level
H03M 3/02 (2006.01)
CPC (source: EP US)
H03M 3/462 (2013.01 - EP US); H03M 3/43 (2013.01 - EP US); H03M 3/456 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0168220 A2 19860115; EP 0168220 A3 19880511; EP 0168220 B1 19911016; CA 1271995 A 19900724; DE 3584398 D1 19911121; US 4684925 A 19870804
DOCDB simple family (application)
EP 85304798 A 19850705; CA 486296 A 19850704; DE 3584398 T 19850705; US 75190985 A 19850705